Valve-guard.



N. 838,612. PATENTED DEC. 1s, 1906.

P. W. PELSBBRG..

, VALVE. GUARD.

UAI

irm'rnn srarns PATENT OFFICE.

FREDERICK IY. FELSBERG, OF DAYTON, KENTUCKY, ASSIGNOR TO THE TRIUMPH ICEMACHINE COMPANY, OF CINCINNATI, OHIO.

VALVE-GUARD.

Specification of Letters Patent Patented Dec. 18, 1906.

Application filed my s1, 1905. sei-1.0.1150. 271,952.

T all whom it may concern:

Be it known that I, FREDERICK W. FELs- BERG, a citizen of the UnitedStates, residing at Dayton, in the county of Campbell and State ofKentucky, have invented certain new and useful Improvements in Valve-Guards, of which the following is a full, clear, and exactspecification.

My present invention relates to improvements in the construction ofvalves for air or gas compressors.

In gas compressors, and particularly in ammonia compressors, such as areemployed in ice-making machinery, quite disastrous results haveaccompanied the accidental breaking or injuring of the spring or spindleof one of the valves to such an extent as to permit said valve to fallinto the compressor-cylinder. A number of different means have beensuggested and employed to prevent such accidental breaking and tominimize the damage and danger resulting therefrom, most of which areunsatisfactory in operation or complicated and expensive to manufacture.

The obj ect of my invention is to simplify the construction andarrangement and reduce the cost of a guard or safety device particularlyadapted for use in connection with the valvesof ice-machines. To thisend I employ the structure which will be hereinafter described, thenovel features of which being more specifically pointed out in theappended claim.

In the accompanying drawings, which illustrate the preferred embodimentof my invention, Figure 1 is a sectional elevation of a portion of acompressor-casing with the valve-housing in position therein, the valvebeing illustrated in elevation. Fig. 2 is a sectional plan view on theline 2 2 of Fig. 1.

Referring now to the drawings, the casing of the machine or compressoris indicated at 5 and has formed therein the passage-way 6, having theconical seat 7 at the inner end thereof. Against said seat rests theconical end of the valve-housing 9, which is securely fastened inposition, so as to make a gastight joint at the seat 7. Said fasteningmeans comprises the annular member 10, threaded into the casing 5 at 11and carrying the independently-adjustable bolts 12, which rest againstthe shoulder 13 of said valvehousing and force said housing tightly key27, held in place by screw 28.

against its seat 7. Such a construction admits of the application ofconsiderable pressure directly downward upon the valvehousing.

The valve-housing 9 is provided at its inner end with the valve-seat 14,against which seats the valve-disk 15, carrying the spindle 16. Thespindle is reciprocably mounted in and is guided by the diaphragm 17,formed integral with or otherwise rigidly attached to the valve-housing.Said diaphragm is formed with the cylindrical extension 18, containingthe working spring 19 and the cushioning 0r buffer spring 20 and alsothe abutments with which said springs coact. Said springs both rest uponthe lower abutment 21, which is fixed in the cylindrical extension 18.The outer end of the spindle is threaded at 22 to receive the nut 23,which acts as the movable abutment coacting with the cushioningspring20. This abutment 23 is adjustable upon the spindle and is locked inplace by the jam-nut 24. The position of said abutment on the spindlefixes the point in the stroke of the valve at which the buffer-spring iscalled into .play and therefore when adjusted varies the cushioningeffect brought to bear upon said valve. The nut 23 is also threaded at25 to receive the nut 26, which acts as the movable abutment for theworking spring 19. The nut 26 can be adjusted relative to nut 23 andspindle 16 to vary the tension on the working spring. It will thus beseen that the tension on the working spring 19 and the cushioning action0f spring 20 may be independently adjusted. The nut 26 is locked inposition by means of the The movable abutments carried by valve-spindle16 reciprocate freely in the cylindrical extension which acts as a guidefor same and as an additional guide for the valve-spindle. Thearrangement just described is not claimed herein, as it forms thesubject-matter of a copending application, Serial No. 271,953, filedJuly 31, 1905. The valve springs and housing are covered by theprotecting-bonnet 29, fastened to the casing 5 by means of bolts 30.

Fixed in the valve-housing just above the valve-disk 15 and held inplace by the annular member 9L is a perforated guard-disk 31, whichcomprises the hub 31h, the radial arms 31a, and the annular ring 31C,joining the outer ends of said arms. The valve-spindle IOO IOS

16 reciprocates through said hub Slb Without making contact with thelatter. upon the valve-spindle 16 above the guarddisk 31 is a collar 33,Which operates Within a recess 32 in the lower end oi the guidingsleeve17, producing a dash-pot action to aid the buffer-spring 2O incushioning the movements of said valve. In case the valve spindle orsprings should become injured or broken the valve would be preventedfrom falling into the compressor-cylinder by the engagement of thecollar 33 with the guarddisk 31.

In the appended claim I aim to cover all modifications Which do notinvolve adeparture from the spirit and scope of the invention.

Having thus described my inventionI what I claim as new7 and desire tosecure by Letters Patent, is-

In a gas-compressor, the combination with the casing, of a valve-housingtherein coni taining a valve-seat, a valve-disk coperat- Formed l ingWith said seat, a spindle attached to' said valve-disk, said spindlehaving a collar formed thereon., a guiding-sleeve for said spindle, aguard for said valve-disk consisting of an independently-removableperforated disk separate from said guiding-sleeve and rigidly fastenedin said housing just above said valve-disk, said spindle operatingthrough an opening in the perforated disk, the opening being of smallerdiameter than said collar and the latter being located vjust above theperforated disk, a protecting-bonnet, and means for fasteningthe-valve-housing and valve-seat in position in the casing independentlyof said bonnet.

In testimony whereof I aHiX my signature in the presence of tWoWitnesses.

FREDERICK W. FELSBERG. Witnesses: l

EDW. MAULINIER, J. S. Louis.

